Drive for drills and similar tools



W. -FHON1PSON AND W. J. ROY. DRIVE FOR DRILLS AND SHVHLAR TOOLS.

APPl'ICATION FILED OCT. 9, I920.

gg ggg, Patented Jui n, 1922.

WILLIAM THOMPSON AND WILFRID ROY, or SPRINGFIELD, l MASSACHUSETTS,

ASSIGNORS'TO CONSOLIDATED moon worms, Inc. or NEW YORK, 1v. Y.,;a COR-- 'PORATION OF NEW YORK.

iDItIViE'l FOR DRILLS AND SIMILAR TOOLS.

Specification of Letters Patent.

Patented July 11, 1922.

Application filed October 9, 1920. Serial No. 415,754.

T 0 all whom it may concern: I

Be it known that we. VILLIAM THOMPSON and VViLrRm J. RoY, citizens ofthe United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Drives for Drills and Similar Tools, of which the following is a specifi cation. l

Our invention relates to a new and improved drive for drills and similar tools.

Drills of various typesfand particularly breast drills, in connection with which the invention in issue is specifically illustrated, have been known for many years. These tools consist essentially of a mechanism of some kind forgripping the cuttingor boring member, and mechanism fordrivingthe said cutting or boring member so as to accomplish the desired result. 1

It was frequently very desirable in tools of this character to have a drive in which the power afforded by the hand of the oper Inanufactured and assembl Other objects of our invention will be set forth in the following description arid'dra'wings which illustrate a preferred embodiment thereof.

Figure 1 is a front elevation of a breast drill embodying our invention.

Figure 2 is a sectional. View showing the means for securing the shaft or spindle of the driving means to the mechanism, these means being in operative position.

Figure 3 is the same as Figure 2, the said securing means being in inoperative position.

Figure 4 is a section along the line 4--4 of Figure 2 and in the direction of the arrow.

The tool proper consists of the usual parts such as the breast rest 1 and the rod 2 secured thereto by means of the set screw 30.

A socket member having two socket por tions 15 and 16 is secured to the rod 2 by means of the set screw 31 which operates within the sleeve 32 into which the rod 2 fits. The socket member 16 carries a yoke 3-1 which is preferably integral with the socket member 16 and is also integral with a sleeve 35, so that the socket members 15 and 16. the sleeve 32, the yoke 34: and the sleeve 35, can be cast as a unit. l

The driven spindle 4 passes throughfthe sleeve 35 and it has the driven bevel gear 14 secured thereto in any suitable manner. so that the driven bevel gear 14 abuts against the inner end of the sleeve 35 and prevents the spindle 4 from being moved out of the sleeve 35. f

The inner end of the spindle 4 preferably fits within the socket member 16. The socket members 15 and16 each have a socket 20 therein as shown more. particularly in Figure 3. y I v The casting which embodies-the socket members 15 and 16 preferably has aside ertension 36 into which thehandle 3 fits.

The outer end of the spindle 4 is provided with the. chuck member 5 and the adjusting sleeve 6 therefor. This part of the construction requires no further description as any well-known type may be used. y

A large or outer bevel gear 10 has an arm 8 provided with a movable handle 9, the bar 8 being secured to bevel gear 10 means of the set screw 7. The inner face of the bevel gear 10 carries a similar or innerbevel gear 11. The gears 10 and 11 are adapted to mesh with the driven bevel gear 1 1 which is keyed in any suitable mannerto the spindle 4:, this detail not being illustrated in the drawings "as in itself it is old and well-known.

The spindle 19 of the bevel gear 10 is adapted to fit snugly within the sockets 20 of the socket members 15 and 16, this being clearly shown in Figure 4.

The spindle 19 has a circumferential notch 40 at the inner. end thereof, as clearly illustrated in Figure 4.

The socket members 15 and 16 are notched or cut away at one end thereof and also have a central depression between them in which the control member 17 can reciprocate.

The control member 17 is normally urged to its outer or operative position by the coil spring 23 which bears against the collar 22 thereof.

The control member 17 is notched as shown in Figures 2 and 3 and latch members 21 pivoted at 18 to the socket members have their inner ends so shaped as shown in Figures 2 and 3, that they freely revolve around their pivots 18 when the control member 17 is reciprocated.

The ends of the latch members 21 are adapted to fit into the notch 10 of the spindle 19.

When it is desired to operate upon some relatively soft material, such as a soft wood for example, the control member 17 is. depressed, thus forcing the latches 21 within the sockets 20 and releasing the spindle 19.

The spindle 19 is then inserted into the socket member 16 and the control member 17 is thenreleased so that it is forced into the position shown in Figure 2 and the latch member 21 which enters the socket 20 of the socket member 16 engages the notch 40 of the spindle 19.

In this position, the gears 11 and 1 1 are in mesh and the spindle 4 is rapidly revolved.

When it is desired to operate upon a harder material, the control member' 17 is depressed by the right hand of the operator and the spindle 19 is inserted into the socket 20 of the socket member 15. w I

The control member 17 is then releasedto assume its operative position and the gears 10 and 14 are then in mesh, thus increasing the force which operates upon the spindle 41.

The device can be constructed out of a small number of parts and can be readily assembled, and is effective and reliable in operation.

We have shown a preferred embodiment of our invention but it is clear that numerous changes and omissions can be made in its details without departing from itsspirit.

We claim g 1. In combination, a casing comprising two adjacent notched socket members having sockets therein, a sleeve projecting from one socket member and adapted to be connected to a breast rest, a yoke projecting from the other socket member and secured to a sleeve adapted to support a revoluble spindle having a bevel gear secured thereto withinthe said'yoke and adjacent the last mentioned socket member, a wheel having an outer bevel gear and an inner bevel gear, both of which are adapted to mesh with the first mentioned bevel gear, the said wheel having a spindle adapted to fit within either of the sockets of the said socket members sons to bring one or the other of its bevel gears into mesh with the first'mentioned bevel gear, a reciprocating member mounted in a recess intermediate the said socket members, latch members pivoted to the said socket members the pivotal axes being parallel to the spindle and so connected to the said reciprocating member as to'be operated by it, so that the said latch members are moved within or without the said sockets, the said spindle having a notch into which the said latches are adapted to fit so as to lock the same in the socket in which it is located.

2. In combinatiom'a casing made of a single casting having two adjacent notched socket members having an intermediate re cess and a sleeve projecting from onesocket member and adapted to be connected to a breast rest'and a yoke projecting from the other socket member-and secured to a sleeve adapted to support a revoluble spindle having a bevel gear secured thereto within the said yoke and adjacent the least mentioned socket member, the said last mentioned socket member having a perforation intoiwhich the said Spindle is adapted to fit, a wheel having an outer bevel gear and an inner bevel gear, both of which are adapted to mesh with the first mentioned bevel gear, the said wheel having a spindle adapted to fit within either of the said socket members so as to bring one or the other of its saidbevel gears into mesh with the first'mentioned bevel gear, ,a reciprocating member. mounted in the said intermediate recess and normally actuated by a spring located'in theisaid recess so as to be urged i outwardly therefrom, 'latch members pivoted to the said. socket members the pivotal a-Xes beingiparallel to the spindle and so connected to the said vreciprocating member as to be, operated byvit, so that-the said 'latch members are moved within or without the said sockets, the said spindle being provided with a notch into which the said latch members are adapted to fit so as to lock the said spindle in the socket in which it is located.

In testimony whereof we hereunto affix our signatures. f

WILLIAh I, THOMPSON.

,WILFRID J. ROY. 

